Reflection high-energy electron diffraction (RHEED) is a widely
used monitoring technique during the molecular-beam-epitaxial
growth processes. The electron beam impinges on the sample
under a grazing incident angle. The obtained reflection-diffraction
intensity of the RHEED pattern oscillates under appropriate
conditions during the growth process. One period of this oscillation
corresponds to the growth of one monolayer. The observed oscillations
during the crystal growth provide a lot of information about
the growth process itself and the grown structures. However, an
easily treatable and still correct description of the RHEED oscillations
is not available, thus lots of information from the RHEED
patterns can be gathered intuitively, and probably more information
could be collected from these images if the model for the
process would be more precise and plausible. In this paper several
approaches for modeling the RHEED oscillations are summarized
and investigated.